$.fn.extend( {
  limiter: function(limit, elem) {
    
    $(this).on("keyup focus", function() {
      setCount(this, elem);
    });

    function setCount(src, elem) {
      var chars = src.value.length;
      if (chars > limit) {
        src.value = src.value.substr(0, limit);
        chars = limit;
      }
      elem.html( limit - chars );
    }
    setCount($(this)[0], elem);

    elem.html(limit);
  }
});
